Readout Optical System of Sapphire Disks intended for Long-Term Data Storage. - V. V. Petrov; V. P. Semynozhenko; V. M. Puzikov; A. A. Kryuchyn; A. S. Lapchuk; S. M. Shanoilo; I. V. Kosyak; Yu. O. Borodin; Ivan V. Gorbov; Ye. M. Morozov (CoRR, 2014)